Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Additional Information (Details)

v3.19.1
Significant Accounting Policies - Additional Information (Details)
3 Months Ended
Mar. 31, 2019
USD ($)
Segment
shares
Jan. 01, 2019
USD ($)
Dec. 31, 2018
USD ($)
Significant Accounting Policies [Line Items]      
Number of operating segment | Segment 1    
Debt and capital lease obligations $ 45,000,000   $ 45,000,000
Long-term debt, fair value 46,000,000   $ 45,600,000
Operating lease, right-of-use asset $ 67,800,000    
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] us-gaap:OtherAssetsNoncurrent    
Operating lease, liability $ 68,953,000    
Accounting Standards Update 2016-02 [Member]      
Significant Accounting Policies [Line Items]      
Operating lease, right-of-use asset   $ 68,000,000  
Operating lease, liability   $ 69,100,000  
Repurchase Program [Member]      
Significant Accounting Policies [Line Items]      
Stock repurchased and retired during period, shares | shares 221,809    
Stock repurchased and retired during period, value $ 30,600,000    
Stock repurchase program, remaining authorized repurchase amount 101,100,000    
Repurchase Program [Member] | Maximum [Member]      
Significant Accounting Policies [Line Items]      
Stock repurchase program, authorized amount $ 250,000,000